Roberto is never quite held up in the same light as the other legendary BB6 males (Derek, Science, Kemal at the time, Craig) but he was a HUGE part of the drama in the first half of the series and a completely unpredictable housemate. Going from kitchen commandant, to seducing Kemal in a speed-dating task and giving him a semi, to pouring pasta over Maxwell's head, to WHATEVA. MINGA. Ugh
It's hard not to mention some of the BB1/2/3/4 housemates because they are obviously a thing of the past and not many of us will have watched their series, but I will always have a soft spot for BB4's Sissy, Tania and Anouska.
As for later series...
- I think Carole's gotten a lot of attention lately but the general consensus during BB8 was she was just a miserable moaner, but she was one of the most outspoken and strong housemates we've ever had
- Mohamed during BB9 was a really nice guy and got involved in a lot of the dynamics but is often written off as a B-block sheep and looked down on because of his ties to Rex/Darnell/Kathreya.
- I really liked Dave & Siavash but I know they're two of the most-hated runners-up on here

- the Travers family were the only people I liked in BB14 (apart from Hazel, who is kinda liked, I guess?)
- Chris BB15 doesn't get nearly the amount of respect he should do for how he conducted himself during the Helen reign